Question

ro ri = 0.05m 1 A pipe with surface temperature T1 = 380 K is wrapped with 0.09 m of glass fiber pipe insulation. The outer surface temperature of the insulation, T2 is equal to 354 K and its emissivity is equal to 0.74. The insulation is also subject to natural convection with a bulk fluid temperature of 298 K and h = 1W/m2-K. For a pipe length of 100 m, and assuming that the room temperature is similar to the bulk fluid temperature, calculate the heat transfer rate from the pipe to the surroundings in kW. [use 4 decimal places when rounding off)

Answer 1